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Synthesis and the Characteristics of Iron/Iron Oxide Nanoparticles

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3 Author(s)
Jun He ; Div. of Functional Mater. Res., Central Iron & Steel Res. Inst., Beijing, China ; Jing An ; Dongliang Zhao

The nanosized Fe magnetic particles were successfully synthesized by traditional carbonyl iron manufacture technique. The active nanoparticles were then effectively passivated to be Fe/Fe3O4 composite structure. The structural characteristics were probed by X-ray diffraction, and transmission electron microscopy. High-resolution images show that the granular composites exhibit a classical nanoscale chained characteristic. The size of iron core is about 10-20 nm with a Fe3O4 superficial layer no more than 5 nm. The room temperature hysteresis measurement indicates that small-size induced magnetic characteristics of these Fe/Fe3O4 composite powders are very attractive for the potential high frequency application. The electromagnetic properties of the powders measured by a vector network analyzer in the centimeter wave frequency range are also reported in detail.

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Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )